tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
dt/net: add helper function of_get_phy_mode
It adds the helper function of_get_phy_mode getting phy interface
from device tree.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David Miller <davem@davemloft.net>
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drivers/of/of_net.c
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drivers/of/of_net.c
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#include <linux/etherdevice.h>
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#include <linux/kernel.h>
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#include <linux/of_net.h>
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#include <linux/phy.h>
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/**
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* It maps 'enum phy_interface_t' found in include/linux/phy.h
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* into the device tree binding of 'phy-mode', so that Ethernet
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* device driver can get phy interface from device tree.
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*/
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static const char *phy_modes[] = {
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[PHY_INTERFACE_MODE_MII] = "mii",
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[PHY_INTERFACE_MODE_GMII] = "gmii",
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[PHY_INTERFACE_MODE_SGMII] = "sgmii",
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[PHY_INTERFACE_MODE_TBI] = "tbi",
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[PHY_INTERFACE_MODE_RMII] = "rmii",
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[PHY_INTERFACE_MODE_RGMII] = "rgmii",
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[PHY_INTERFACE_MODE_RGMII_ID] = "rgmii-id",
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[PHY_INTERFACE_MODE_RGMII_RXID] = "rgmii-rxid",
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[PHY_INTERFACE_MODE_RGMII_TXID] = "rgmii-txid",
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[PHY_INTERFACE_MODE_RTBI] = "rtbi",
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};
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/**
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* of_get_phy_mode - Get phy mode for given device_node
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* @np: Pointer to the given device_node
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*
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* The function gets phy interface string from property 'phy-mode',
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* and return its index in phy_modes table, or errno in error case.
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*/
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const int of_get_phy_mode(struct device_node *np)
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{
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const char *pm;
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int err, i;
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err = of_property_read_string(np, "phy-mode", &pm);
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if (err < 0)
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return err;
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for (i = 0; i < ARRAY_SIZE(phy_modes); i++)
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if (!strcasecmp(pm, phy_modes[i]))
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return i;
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return -ENODEV;
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}
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EXPORT_SYMBOL_GPL(of_get_phy_mode);
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/**
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* Search the device tree for the best MAC address to use. 'mac-address' is